Carboxylic acids can be made from Grignards by treating the Grignard reagents with ________.

A) carbon monoxide
B) esters
C) aldehydes
D) diborane
E) carbon dioxide

Carboxylic acids can be synthesized by treating Grignard reagents with carbon dioxide. The reaction involves the nucleophilic addition of the Grignard reagent to the electrophilic carbon atom of carbon dioxide, followed by acid work-up to yield the carboxylic acid.